Car bomb blasts across Iraq have killed more than 70 people, just hours after former dictator Saddam Hussein was executed for crimes against humanity.

Security officials in Baghdad say three coordinated bomb attacks in a mixed Shi'ite and Sunni area of the city (Hurriya) Saturday killed at least 25 people and wounded more than 65 others. Other blasts killed several more people in the Iraqi capital.

In Kufa, a Shi'ite holy city near Najaf, Iraqi officials say a car bomb in a crowded market killed 31 people and wounded at least 58 others.

It is not clear whether the attacks were related to the execution of Saddam.

Also Saturday, U.S military officials announced the deaths of six American service members, making December the deadliest month for U.S. forces in two years. Nearly 3,000 U.S. military personnel have been killed in Iraq since the U.S.-led invasion began in 2003.

Some information for this report was provided by AFP, AP and Reuters.